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A sample of n = 15 scores produces a t statistic of t = -0.50. What is the value of the effect size, r2?  (round to 2 decimal places)

What statistic can we calculate to determine if the homogeneity of variance assumption was violated ?

Health researchers conduct a study comparing panic disorders rates among high school students to the nationwide average of 20. Researchers select a sample of 15 students who have a mean score of 26 (S= 4.5). Calculate the t statistic  (round to 2 decimal places)

The correlation coefficient is used to measure the ____________ and _____________ of the linear relationship between two factors.

What question(s), if any, did you find the most challenging?

ANOVA is an acronym for _______________

The average crying time of infants during naptime at preschool is 12 minutes. The school implements a new naptime routine in a sample of 25 infants and records a mean crying time of 8 ± 4.6 (M±S) minutes. Calculate the t statistic (round to 2 decimal places)

A researcher conducts an independent sample t test and obtains the value of t(49) = 2.562 and the critical value of ±2.320. What is the correct decision to take based on these data?

A researcher is interested in whether exercise improves memory. The researcher randomly selects 100 participants, assigns them to an exercise programs and measures memory at the end of the exercise program. The population mean on the memory test is 25. How should the alternative hypothesis be stated for a non-directional, one sample t test?

A researcher conducts a one sample sample t test and obtains the value of t(16) = -5.56 and the critical value of ±2.320. What is the correct decision to take based on these data?